// Copyright (c) 2004 Brian Wellington (bwelling@xbill.org)

package org.xbill.DNS;

import java.io.*;

/**
 * Implements common functionality for the many record types whose format is an
 * unsigned 16 bit integer followed by a name.
 * 
 * @author Brian Wellington
 */

abstract class U16NameBase extends Record {

	private static final long serialVersionUID = -8315884183112502995L;

	protected int u16Field;
	protected Name nameField;

	protected U16NameBase() {
	}

	protected U16NameBase(Name name, int type, int dclass, long ttl) {
		super(name, type, dclass, ttl);
	}

	protected U16NameBase(Name name, int type, int dclass, long ttl,
			int u16Field, String u16Description, Name nameField,
			String nameDescription) {
		super(name, type, dclass, ttl);
		this.u16Field = checkU16(u16Description, u16Field);
		this.nameField = checkName(nameDescription, nameField);
	}

	void rrFromWire(DNSInput in) throws IOException {
		u16Field = in.readU16();
		nameField = new Name(in);
	}

	void rdataFromString(Tokenizer st, Name origin) throws IOException {
		u16Field = st.getUInt16();
		nameField = st.getName(origin);
	}

	String rrToString() {
		StringBuffer sb = new StringBuffer();
		sb.append(u16Field);
		sb.append(" ");
		sb.append(nameField);
		return sb.toString();
	}

	protected int getU16Field() {
		return u16Field;
	}

	protected Name getNameField() {
		return nameField;
	}

	void rrToWire(DNSOutput out, Compression c, boolean canonical) {
		out.writeU16(u16Field);
		nameField.toWire(out, null, canonical);
	}

}
